package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavoMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
	@Autowired
	private DishMapper dishMapper;
	@Autowired
	private DishFlavoMapper dishFlavoMapper;
	@Autowired
	private SetmealDishMapper setmealDishMapper;
	@Autowired
	private SetmealMapper setmealMapper;
	@Autowired
	private SetmealDishMapper stemealDishMapper;
	
	/**
	 * 新增菜品和口味
	 *
	 * @param dishDTO
	 */
	@Transactional
	public void saveWithFlavor(DishDTO dishDTO) {
		Dish dish = new Dish();
		BeanUtils.copyProperties(dishDTO, dish);
		//向菜品表插入数据
		dishMapper.insert(dish);
		//获取insert语句生成的主键值
		long id = dish.getId();
		
		List<DishFlavor> flavors = dishDTO.getFlavors();
		if (flavors != null && flavors.size() > 0) {
			flavors.forEach(dishFlavor -> {
				dishFlavor.setDishId(id);
			});
			//向口味表插入条数据
			dishFlavoMapper.insertBatch(flavors);
		}
	}
	
	/**
	 * 菜品分页查询
	 *
	 * @param dishPageQueryDTO
	 * @return
	 */
	@Override
	public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
		PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
		Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
		return new PageResult(page.getTotal(), page.getResult());
	}
	
	
	/**
	 * 菜品删除
	 *
	 * @param ids
	 */
	
	
	@Override
	@Transactional
	public void deleteBatch(List<Long> ids) {
		//判断当前菜品是否能够删除---是否存在起售中的菜品？？
		for (Long id : ids) {
			Dish dish = dishMapper.getById(id);
			if (dish.getStatus() == StatusConstant.ENABLE) {
				//当前菜品正在起售中，不能删除
				throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
			}
		}
		//判断当前菜品是否能够删除---是否被套餐关联了？？
		List<Long> stemealIds = setmealDishMapper.getSetmealIdsByDishId(ids);
		if (stemealIds != null && stemealIds.size() > 0) {
			//当前菜品被套餐关联了，不能删除
			throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
		}
		//删除菜品表中的菜品数据
	/*	for (Long id : ids) {
			dishMapper.deleteById(id);
			//删除菜品关联的口味数据
			dishFlavoMapper.deleteByDishId(id);
		}*/
		//根据菜品id删除菜品关联的口味数据
		dishMapper.deleteByIds(ids);
		dishFlavoMapper.deleteByDishIds(ids);
	}
	/**
	 * 根据id查询菜品
	 * @param id
	 * @return
	 */
	@Override
	public DishVO getByIdWithFlavor(Long id) {
		// 根据id查询菜品数据
		Dish dish = dishMapper.getById(id);
		
		// 如果菜品不存在，返回null或抛出异常
		if (dish == null) {
			return null; // 或者抛出异常，例如：throw new ResourceNotFoundException("Dish not found with id: " + id);
		}
		
		// 根据id查询口味数据
		List<DishFlavor> dishFlavors = dishFlavoMapper.getByDishId(id);
		
		// 将查询到的数据封装到VO
		DishVO dishVO = new DishVO();
		BeanUtils.copyProperties(dish, dishVO);
		dishVO.setFlavors(dishFlavors);
		
		return dishVO;
	}
	/**
	 * 根据id修改菜品基本信息和口味信息
	 * @param dishDTO
	 */
	@Override
	public void updateWithFlavor(DishDTO dishDTO) {
		Dish dish = new Dish();
		BeanUtils.copyProperties(dishDTO, dish);
		//  修改菜品表基本信息
		dishMapper.update(dish);
		//删除原有的口味信息
		dishFlavoMapper.deleteByDishId(dishDTO.getId());
		//重新插入口味数据
		List<DishFlavor> flavors = dishDTO.getFlavors();
		if (flavors != null && flavors.size() > 0) {
			flavors.forEach(dishFlavor -> {
				dishFlavor.setDishId(dishDTO.getId());
			});
			//向口味表插入条数据
			dishFlavoMapper.insertBatch(flavors);
		}
	}
	/**
	 * 条件查询菜品和口味
	 * @param dish
	 * @return
	 */
	@Override
	public List<DishVO> listWithFlavor(Dish dish) {
		List<Dish> dishList = dishMapper.list(dish);
		
		List<DishVO> dishVOList = new ArrayList<>();
		
		for (Dish d : dishList) {
			DishVO dishVO = new DishVO();
			BeanUtils.copyProperties(d,dishVO);
			
			//根据菜品id查询对应的口味
			List<DishFlavor> flavors =dishFlavoMapper.getByDishId(d.getId());
			
			
			dishVO.setFlavors(flavors);
			dishVOList.add(dishVO);
		}
		
		return dishVOList;
	}
	/**
	 * 根据分类id查询菜品
	 * @param categoryId
	 * @return
	 */
	public List<Dish> list(Long categoryId) {
		Dish dish = Dish.builder()
				.categoryId(categoryId)
				.status(StatusConstant.ENABLE)
				.build();
		return dishMapper.list(dish);
	}
	
	/**
	 * 菜品起售停售
	 *
	 * @param status
	 * @param id
	 */
	@Transactional
	public void startOrStop(Integer status, Long id) {
		// 查询原始数据
		Dish dish = dishMapper.getById(id);
		if (dish == null) {
			throw new RuntimeException("菜品不存在");
		}
		
		// 只更新 status 字段
		dish.setStatus(status);
		dishMapper.updateDish(dish);
		
		if (status == StatusConstant.DISABLE) {
			// 如果是停售操作，还需要将包含当前菜品的套餐也停售
			List<Long> dishIds = new ArrayList<>();
			dishIds.add(id);
			List<Long> setmealIds = stemealDishMapper.getSetmealIdsByDishIds(dishIds);
			if (setmealIds != null && setmealIds.size() > 0) {
				for (Long setmealId : setmealIds) {
					Setmeal setmeal = Setmeal.builder()
							.id(setmealId)
							.status(StatusConstant.DISABLE)
							.build();
					setmealMapper.update(setmeal);
				}
			}
		}
	}
	
	
}
